Just because Kourtney Kardashian's been indulging in a little uncharacteristic club-hopping (with Justin Bieber!) lately doesn't mean she's not the same old homebody/mama we all know and love! Need proof? Just take a look at her "New Year's Eve Kiss" Instagram with her adorable 12-month-old son Reign!

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Awww! Of course Kourt would ring in 2016 with the people who are most important to her -- Reign and his older siblings, 6-year-old Mason and 3-year-old Penelope. She's made it abundantly clear, over and over again, that her kids are her #1 priority. And why shouldn't they be? Just look at this little face!

Too sweet! And so much cuter and cozier than most people's New Year's Eve smooches, I'm willing to bet. Of course, gossip hounds are dying to know ... where was THE BIEBS?? Personally, I'm still not buying that they're even a couple. I pretty much believe that Kourtney's committed to taking some time for herself right now. As she told her mom, Kris Jenner, in a sneak peek for this Sunday's episode of KUWTK:

"I'm not a dating person. I did the dating thing before Scott for, like, a minute, and it was so not for me. I just got out of a nine-year relationship. I think the last thing I probably need is anybody in my life.”